Electrotyping-case polisher



Y 0. D`. HARDEN. ELECTROTYPING CASE POLISHEFL APPLICATION men MAR. 11.4921'. 1,418,074. 'Patented May 30, 1922.

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ORA DWANE HARDEN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY IVIESNE ASSIGNMENTS, 0F ONE-HALF T0 CHARLES E. SUMMERS, OF. CHICAGO, ILLINOIS.

ELECTROTYPING-CASE FOLISI-IER.

Specification of Letters Patent.

Patented May 30, 1922.

To all whom 'if may concern.'

Be it known that I, ORA D. HARDEN, a l citizen of the United States, resid-ing at Chicago, in the county of Cook and State of Illinoishave invented certain new and useful Improvements in Electrotyping-Oase Polishers, of which the following 'is a specification.

The invention relates to improvements in electrotyping case polishers.

One of the objects of the invention is to provide improved means for coating and polishing or burnishing wax cases or matrices used in electrotyping.

Another object is to provide improved means. for applying powdered graphite, plumbago, black lead, or the like, to the surfaces of the wax forms or matrices, usually called waxy cases, preliminarily to copperplating the exposed surfaces thereof in the process of making electrotypes, and for reclaiming the excess of the powdered material that does not adhere to the wax surfaces, which otherwise would be blown off the form as a result of the usual manner of cleaning the coated surfaces after being polished.

The usual manner of applying the powdered electro-conducting material to the surfaces of the wax cases is not only wasteful but exceedingly untidy, because the very line powder when blown off the case floats around the room and finally settles as very objectionable dust on all exposed objects. It is furthermore objectionable on account of its color and the tenacity with which it adheres to ones hands, face and clothing.

Other, further and more specific objects of the invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in Aconjunction with the drawings, wherein Fig. 1 vshows in elevation parts of the invention for carrying it into effect.

Fig. 2 is an enlarged horizontal section through the longest axis of the brush.

Fig. 3 is a similar section of the aspirator used for attenuating the air within the confines of the bristles of the brush.

In all of the views the same reference characters are employed to indicate similar parts. f

A brush 5 has a back 6 and tufts of bristles 7, secured to the brush back. These bristles are soft and of fine quality so as not to scratch or otherwise injurev the rather soft wax surfaces with which they are brought into contact when in use. A soft rubber band, or other air-proof, yielding material, 8, is placed around the back 6 and Jthe bristlesy 7. It does not quite reach the bottom. ends of the bristles so as toleave these ends free for contact with the wax surfaces.

cating with the hose 12, through the fitting 13, is a bore 15 closed at one end. This bore is bisected at right angles by a twopartv bore 16 into which is threaded a pipe 17. The lower end of the pipe 17 is shown connected to a short section 18 of larger pipe and to this is connected a filter bag 19. Extending axially of the bore 16, on the opposite side of the bore 15, is a hub 2O within which is fixed a small tube 21, the inner end 22 of which extends into the inner end of the pipe 17. A valve 23 is screwed to the end of the hub 20 and to the end of the valve a hose 24 is connected. This hose is to be connected to any suitable source of compressed air.

To use the device the brush 5 is dipped into a vessel or pan containing graphite. The amount that adheres to the protruding ends of the bristles 7 is applied to the wax form or case and evenly distributed to the surfaces thereof. The brush may be dipped into the graphite until sufficient quantity has been applied to the case to thoroughly cover it. Then the brush is rubbed frequently over the surfaces to produce a burnished effect known as polishing. In applying the graphite there is always an excess quantity that does not adhere to the form. To remove the loose graphite the valve 23 is opened, whereupon air passing thru the vsmall tube 21 into the larger pipe 17 proup and reclaiming the loose unused powder in the manner described.

While I have herein described a single embodiment of the invention for the pur- `pose of clear disclosure, it will be manifest,

to persons skilled in the art, that various changes in the coniigurations and dispositions of the parts can be made within the spiritl and scope of the appended claims.

Having described my invention what I yclaim as new and desire to secure by Letters Patent, is :q

1. In a device of the character described,

4the combination of a' brush having a back with a body of bristles connected thereto; a row of centrally disposed tubes extending through the back into the body of bristles; a centrally disposed pipe, secured to the back, in which the tubes terminate; a yielding airopen end being connected by a hose to a brush, and having a transverse, through and through, two-part bore, bisecting the iirst mentioned bore; a pipe in one part of the two-part bore connected to a filter bag; a tube in the other part of said two-part bore extending into said pipe ;,means for connecting a source of compressed air to said tube; a brush having a back; a body of bristles extending from one side thereof; an air pipe secured to the back and communicating through the back with the body of bristles and a housing of soft rubber extending around the edge, of the back, and .around the body of bristles, terminating above the free edges of the bristles, whereby to draw air and particles through the body of bristles of the brush when compressed air is introduced into said tube. p l

In testimony whereof I hereunto subscribe my name.

ORA DWANE 

